How do atm machines spot counterfeit money?
I think ATM only dispenses money, they then don’t check on the counterfeit notes. The deposit taking machine (if you call them ATM also) will detect counterfeit money with various means; one among them is the ink which they have the capacity to scan; also they could scan picture in comparison with the picture they have in their memories. Other thing would be that they preloaded with point detector of the counterfeit banknotes series; i.e. 1990 100 notes counterfeit will have mark at the lower end of the back. This is a big science, but some good machines can detect close to 99 per cent (of course that leaves a lot of one big percent).
